CN109065826A - A kind of wetting method of high capacity high-pressure solid negative electrode lithium ion battery - Google Patents
A kind of wetting method of high capacity high-pressure solid negative electrode lithium ion battery Download PDFInfo
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- CN109065826A CN109065826A CN201810739200.7A CN201810739200A CN109065826A CN 109065826 A CN109065826 A CN 109065826A CN 201810739200 A CN201810739200 A CN 201810739200A CN 109065826 A CN109065826 A CN 109065826A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/446—Initial charging measures
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The present invention relates to lithium ion battery preparation field, in particular to a kind of wetting method of high capacity high-pressure solid negative electrode lithium ion battery.On the basis of high temperature infiltration, it is shelved using vacuum pumping liquid injection, high temperature, chemical conversion, high temperature are shelved in advance, secondary injection fluid-tight mouth, continuous chemical conversion have six stages altogether, it is sufficiently infiltrated for high capacity high-pressure solid cathode, first is that infiltrating efficient advantage retaining high temperature, it is shelved using high temperature twice front and back, reduce infiltrating time and waiting time, saves time cost；Second is that increasing pre- chemical conversion and continuous formation process, the ability of high capacity high-pressure solid cathode absorption electrolyte is promoted, avoids analysing lithium phenomenon in charge and discharge process；Improve the cycle life of high capacity high-pressure solid lithium ion battery.
Description
Technical field
The present invention relates to lithium ion battery preparation field, in particular to a kind of high capacity high-pressure solid negative electrode lithium ion battery
Wetting method.
Background technique
Energy shortage and environmental pollution are the two large problems that modern society faces, in order to alleviate the energy and environmental pressure, electricity
Electrical automobile industry is come into being, and fast-developing electric car gradually replaces fuel vehicle to have become contemporary inexorable trend.Lithium ion battery
Have many advantages, such as that good cycle, energy density are high, operating temperature range is big, memory-less effect, green non-pollution.
Continuous pursuit with people to lithium ion battery energy density, is also continuously improved battery pole piece compacted density.
Compacted density raising increases difficulty to the infiltration of pole piece.In order to produce better lithium ion battery, it is necessary to optimize its production system
Impregnation process in work.Currently, the wetting method of lithium ion battery mainly includes following method: (1) room temperature infiltrates: battery core fluid injection
Afterwards, it by shelving 40 to 48h at room temperature, infiltrates into electrolyte slowly inside battery core, by being melted into advance, infiltrates electrolyte
Inside pole piece；(2) high temperature infiltrates: after battery core fluid injection, after shelving 30h to 38h at high temperature, infiltrating into electrolyte slowly
Inside battery core, by being melted into advance, make inside electrolyte infiltration pole piece.But in terms of high capacity high-pressure solid negative electrode material, room temperature
Infiltration technique cannot achieve electrolyte in the abundant infiltration of negative electrode tab, cause negative electrode active material activation insufficient, lithium ion without
Method is freely embeddable, and causes analysis lithium phenomenon.In addition, high temperature infiltration technique is able to achieve on the basis of room temperature infiltration, improved using high temperature
The diffusion velocity of electrolyte, but it is unobvious to pole piece inside wetting capacity effect is improved, it still cannot achieve high capacity high-pressure solid
The abundant infiltration of negative electrode lithium ion power battery.
Summary of the invention
For current lithium ion battery room temperature infiltration general difficulty, battery core liquid loss amount is high, cycle life is undesirable asks
Topic, the present invention provide a kind of wetting method of high capacity high-pressure solid negative electrode lithium ion battery.
The present invention is achieved by the following technical solutions:
A kind of wetting method of high capacity high-pressure solid negative electrode lithium ion battery, comprising the following steps:
S1, vacuum pumping liquid injection: the battery prepared is placed on fluid injection frame, and electrolysis needed for 105wt% is put into fluid injection frame
The amount of liquid, so amount to be injected needs to increase by 5%, guarantees note because electrolyte can volatilize during circulation vacuumizes
Enter sufficient electrolyte.Fluid injection is placed in vacuum tank and is vacuumized, the pipe tail portion of pressure release after vacuum pressure maintaining, pressure release connects one
Exhaust gas processing device is shelved after pressure release, electrolyte is allowed slowly to permeate inside battery core, then recycles three to six times；
S2, high temperature are shelved: battery core unsealed after vacuum pumping liquid injection being shelved at high temperature, liquid injection port is upward, puts
8~12h is set, while being filled with inert gas in baking oven and being protected.Nitrogen charging gas shielded is beneficial to prevent electrolyte and was shelving
It absorbs water in journey, high temperature is shelved with the diffusion for being conducive to accelerate electrolyte, allows inside electrolyte permeability to battery core；
S3, pre- chemical conversion: on charging equipment, the battery core after the completion of step S2 is carried out in advance with the electric current of 0.01C~0.2C
Charging, charging upper limit voltage are 3.2V~3.6V, and the charging time is 30min~300min；Pre- chemical conversion is conducive to electrolyte infiltration
To inside pole piece；
S4, high temperature are shelved: battery core will not be sealed after pre- chemical conversion shelve at high temperature, liquid injection port is upward, and shelve 8~
14h, while being filled with inert gas in baking oven and being protected.High temperature, which is shelved with, to be conducive to remove the gas generated in formation process,
After avoiding sealing, bubble is generated, pole piece interface is bad.High-pressure solid pole piece hole is smaller, while high temperature is shelved and is also conducive to electrolyte
Diffusion and infiltration inside pole piece；
S5, secondary fluid injection, sealing: the battery for completing step S4 is placed on fluid injection frame, 105wt% institute is put into fluid injection frame
The amount of electrolyte is needed, because electrolyte can volatilize during circulation vacuumizes, with above-mentioned steps S1, the amount to fluid infusion is needed
Increase by 5%.Fluid injection is placed in vacuum tank and is vacuumized, pressure release after vacuum pressure maintaining, the pipe tail portion of pressure release connects a tail gas
Processing unit shelves after pressure release, electrolyte is allowed slowly to permeate inside battery core, then recycles two to four completion fluid infusion, fluid infusion
Afterwards by battery seal；Cycle-index is excessive herein, the electrolyte in script injection battery core can be released.The purpose of secondary fluid injection
Primarily to making up the loss of hydrojet in the deficiency and pre- formation process of first time reservoir quantity, guarantee battery in following cycle mistake
Electrolyte is sufficient in journey, keeps good cycle life；
S6, continuous chemical conversion: on charging equipment, the battery core after the completion of step S5 is carried out again with the electric current of 0.01C~0.2C
Charging, charging upper limit voltage are 3.4V~3.65V, and the charging time is 30min~300min；Gao Rong is completed after continuous chemical conversion
Measure the impregnation process of high-pressure solid lithium ion battery.
Preferably, the battery is cylindrical battery or rectangular cell.
Preferably, the vacuum degree of vacuum pumping liquid injection process described in step S1 is -0.09~-0.095MPa.
Preferably, the vacuum dwell time described in step S1 is 1~2min.
Preferably, it is 5~15min that the time is shelved after pressure release described in step S1.
Preferably, the temperature that high temperature described in step S2 is shelved is 35~40 DEG C, and the time is 10~12h.
Preferably, the temperature that high temperature described in step S4 is shelved is 35~40 DEG C, and the time is 10~12h.
Preferably, pre- chemical conversion described in step S3 is charged with the electric current charging 120min of 0.05C or with the electric current of 0.1C
60min。
Preferably, continuous chemical conversion described in step S6 is charged with the electric current charging 120min of 0.05C or with the electric current of 0.1C
60min。
The beneficial effects of the present invention are:
The present invention is shelved, chemical conversion, high temperature are shelved, is secondary in advance on the basis of high temperature infiltrates using vacuum pumping liquid injection, high temperature
Fluid injection sealing, continuous chemical conversion have six stages altogether, are sufficiently infiltrated for high capacity high-pressure solid cathode, first is that retaining high temperature leaching
Moisten efficient advantage, front and back is shelved using high temperature twice, reduces infiltrating time and waiting time, saved time cost；
Second is that increasing pre- chemical conversion and continuous formation process, the ability of high capacity high-pressure solid cathode absorption electrolyte is improved, is efficiently solved
Low hole negative electrode tab generally infiltrates difficult problem, avoids analysing lithium phenomenon in charge and discharge process, is effectively improved high-pressure solid cathode lithium
Ion battery high internal resistance and short-life problem, while the high advantage of current high temperature wetting efficiency is remained again；In addition high capacity
The cycle life of high-pressure solid lithium ion battery enhances, and security performance is also improved.
Detailed description of the invention
Fig. 1 is the scanning electron microscope (SEM) photograph of high capacity high-pressure solid negative electrode tab prepared by the embodiment of the present invention 1；
Fig. 2 is the circulation comparison diagram of a fluid injection and secondary fluid injection in the embodiment of the present invention 1~3.
Specific embodiment
Below by specific embodiment, technical scheme of the present invention will be further explained in detail.It should be appreciated that this hair
Bright implementation is not limited by the following examples, and the accommodation in any form or change made to the present invention fall within this
Invention protection scope.
In the present invention, if not refering in particular to, all percentage is unit of weight, used equipment and raw material etc.
It is bought from market or commonly used in the art.Method in following embodiments is unless otherwise instructed the routine side of this field
Method.
Embodiment 1
The low hole high-pressure solid negative electrode material that wetting method of the present invention obtains is shown in Fig. 1, a kind of high capacity high-pressure solid cathode lithium
The wetting method of ion battery, the specific steps are as follows:
1) vacuum pumping liquid injection: the cylindrical battery prepared is placed on the fluid injection frame with cup scale metered, is put into 105% institute
Need the amount of electrolyte.Fluid injection is placed in vacuum tank and is vacuumized, vacuum tank vacuum degree control is in -0.09MPa, vacuum pressure maintaining
Between 2min, then pressure release, the pipe tail portion of pressure release connects an exhaust gas processing device, time 10min shelved after pressure release, allows electrolyte
It slowly permeates, is then recycled three times inside battery core；
2) high temperature is shelved: by do not sealed after vacuum pumping liquid injection battery core 35 DEG C at a temperature of shelve, liquid injection port is upward,
Shelve time 10h, while nitrogen charging gas shielded in baking oven；
3) pre- chemical conversion: on charging equipment, the battery core after the completion of step 2) is pre-charged with the electric current of 0.05C, is filled
Electric upper limit voltage is 3.4V, charging time 120min；
4) high temperature is shelved: will not seal after pre- chemical conversion battery core 40 DEG C at a temperature of shelve, liquid injection port is upward, shelves
Time 8h, while nitrogen charging gas shielded in baking oven；
5) secondary fluid injection, sealing: the cylindrical battery for completing step 4) is placed on the fluid injection frame with cup scale metered, is put into
The amount of supplement electrolyte needed for 105%.Fluid injection is placed in vacuum tank and is vacuumized, vacuum tank vacuum degree control-
0.09MPa, vacuum dwell time 1min, then pressure release, the pipe tail portion of pressure release connect an exhaust gas processing device, shelve after pressure release
Time 5min, allows electrolyte slowly to permeate inside battery core, then recycles twice, battery seal after fluid infusion；
6) continue chemical conversion: on charging equipment, the battery core after the completion of step 5) being recharged with the electric current of 0.1C, charge
Upper limit voltage is 3.4V, charging time 60min；The infiltration of high capacity high-pressure solid lithium ion battery is completed after continuous chemical conversion
Process.Subsequent machining technology is consistent with prior art.
The normal temperature circulation service life of final finished battery is as shown in Figure 2.After measured, battery manufactured in the present embodiment is followed when room temperature
When ring proceeds to 640 weeks, the capacity retention ratio 85.84% of battery illustrates to use the high-pressure solid cathode power battery wetting method
Afterwards, battery cycle life is preferable.
Embodiment 2
A kind of wetting method of high capacity high-pressure solid negative electrode lithium ion battery, the specific steps are as follows:
1) vacuum pumping liquid injection: the cylindrical battery prepared is placed on the fluid injection frame with cup scale metered, is put into 105% institute
Need the amount of electrolyte.Fluid injection is placed in vacuum tank and is vacuumized, vacuum tank vacuum degree control is in -0.09MPa, vacuum pressure maintaining
Between 2min, then pressure release, the pipe tail portion of pressure release connects an exhaust gas processing device, time 10min shelved after pressure release, allows electrolyte
It slowly permeates, is then recycled three times inside battery core；
2) high temperature is shelved: by do not sealed after vacuum pumping liquid injection battery core 40 DEG C at a temperature of shelve, liquid injection port is upward,
Shelve time 10h, while nitrogen charging gas shielded in baking oven；
3) pre- chemical conversion: on charging equipment, the battery core after the completion of step 2) is pre-charged with the electric current of 0.05C, is filled
Electric upper limit voltage is 3.4V, charging time 120min；
4) high temperature is shelved: will not seal after pre- chemical conversion battery core 40 DEG C at a temperature of shelve, liquid injection port is upward, shelves
Time 10h, while nitrogen charging gas shielded in baking oven；
5) secondary fluid injection, sealing: the cylindrical battery for completing step 4) is placed on the fluid injection frame with cup scale metered, is put into
The amount of supplement electrolyte needed for 105%.Fluid injection is placed in vacuum tank and is vacuumized, vacuum tank vacuum degree control-
0.09MPa, vacuum dwell time 1min, then pressure release, the pipe tail portion of pressure release connect an exhaust gas processing device, shelve after pressure release
Time 10min, allows electrolyte slowly to permeate inside battery core, then recycles twice, battery seal after fluid infusion；
6) continue chemical conversion: on charging equipment, the battery core after the completion of step 5) being recharged with the electric current of 0.05C, is filled
Electric upper limit voltage is 3.4V, charging time 120min；High capacity high-pressure solid lithium ion battery is completed after continuous chemical conversion
Impregnation process.Subsequent machining technology is consistent with prior art.
The normal temperature circulation service life of final finished battery is as shown in Figure 2.After measured, battery manufactured in the present embodiment is followed when room temperature
When ring proceeds to 640 weeks, the capacity retention ratio 91.25% of battery, after the high-pressure solid cathode power battery wetting method, electricity
Pond cycle life gets a promotion.
Embodiment 3
The low hole high-pressure solid negative electrode material of wetting method of the present invention used is shown in Fig. 1, the specific steps are as follows:
1) vacuum pumping liquid injection: the cylindrical battery prepared is placed on the fluid injection frame with cup scale metered, is put into 105% institute
Need the amount of electrolyte.Fluid injection is placed in vacuum tank and is vacuumized, vacuum tank vacuum degree control is in -0.095MPa, vacuum pressure maintaining
Time 2min, then pressure release, the pipe tail portion of pressure release connect an exhaust gas processing device, time 10min are shelved after pressure release, allow electrolysis
Liquid slowly permeates inside battery core, then recycles three times；
2) high temperature is shelved: by do not sealed after vacuum pumping liquid injection battery core 35 DEG C at a temperature of shelve, liquid injection port is upward,
Shelve time 8h, while nitrogen charging gas shielded in baking oven；
3) pre- chemical conversion: on charging equipment, the battery core after the completion of step 2) is pre-charged with the electric current of 0.1C, is charged
Upper limit voltage is 3.4V, charging time 60min；
4) high temperature is shelved: will not seal after pre- chemical conversion battery core 40 DEG C at a temperature of shelve, liquid injection port is upward, shelves
Time 8h, while nitrogen charging gas shielded in baking oven；
5) secondary fluid injection, sealing: the cylindrical battery for completing step 4) is placed on the fluid injection frame with cup scale metered, is put into
The amount of supplement electrolyte needed for 105%.Fluid injection is placed in vacuum tank and is vacuumized, vacuum tank vacuum degree control-
0.09MPa, vacuum dwell time 1min, then pressure release, the pipe tail portion of pressure release connect an exhaust gas processing device, shelve after pressure release
Time 10min, allows electrolyte slowly to permeate inside battery core, then recycles twice, battery seal after fluid infusion；
6) continue chemical conversion: on charging equipment, the battery core after the completion of step 5) being recharged with the electric current of 0.2C, charge
Upper limit voltage is 3.6V, charging time 30min；The infiltration of high capacity high-pressure solid lithium ion battery is completed after continuous chemical conversion
Process.Subsequent machining technology is consistent with prior art.
The normal temperature circulation service life of final finished battery is as shown in Figure 2.As shown in Table 1, when normal temperature circulation proceeds to 580 weeks
When, the capacity retention ratio 65.64% of battery, after the high-pressure solid cathode power battery wetting method, battery cycle life exists
Decaying rapidly, is primarily due to high temperature and shelves that the time is shorter, the electric current for continuing chemical conversion is larger, leads to leaching inside pole piece after 500 weeks
Moisten it is insufficient, pole piece may occur analyse lithium, consumption electrolyte it is more, cause recycle later period insufficient electrolyte, influence cycle life.
But its effect battery that still other methods obtain than in the prior art is more preferable, still acceptable when specifically used.
Embodiment 4
A kind of wetting method of high capacity high-pressure solid negative electrode lithium ion battery, the specific steps are as follows:
1) vacuum pumping liquid injection: the cylindrical battery prepared is placed on the fluid injection frame with cup scale metered, is put into 105% institute
Need the amount of electrolyte.Fluid injection is placed in vacuum tank and is vacuumized, vacuum tank vacuum degree control is in -0.098MPa, vacuum pressure maintaining
Time 5min, then pressure release, the pipe tail portion of pressure release connect an exhaust gas processing device, time 15min are shelved after pressure release, allow electrolysis
Liquid slowly permeates inside battery core, then recycles six times；
2) high temperature is shelved: by do not sealed after vacuum pumping liquid injection battery core 45 DEG C at a temperature of shelve, liquid injection port is upward,
Shelve time 12h, while nitrogen charging gas shielded in baking oven；
3) pre- chemical conversion: on charging equipment, the battery core after the completion of step 2) is pre-charged with the electric current of 0.01C, is filled
Electric upper limit voltage is 3.2V, charging time 300min；
4) high temperature is shelved: will not seal after pre- chemical conversion battery core 45 DEG C at a temperature of shelve, liquid injection port is upward, shelves
Time 14h, while nitrogen charging gas shielded in baking oven；
5) secondary fluid injection, sealing: the cylindrical battery for completing step 4) is placed on the fluid injection frame with cup scale metered, is put into
The amount of supplement electrolyte needed for 105%.Fluid injection is placed in vacuum tank and is vacuumized, vacuum tank vacuum degree control-
0.098MPa, vacuum dwell time 5min, then pressure release, the pipe tail portion of pressure release connect an exhaust gas processing device, put after pressure release
Time 15min is set, electrolyte is allowed slowly to permeate inside battery core, is then recycled four times, battery seal after fluid infusion；
6) continue chemical conversion: on charging equipment, the battery core after the completion of step 5) being recharged with the electric current of 0.05C, is filled
Electric upper limit voltage is 3.4V, charging time 120min；High capacity high-pressure solid lithium ion battery is completed after continuous chemical conversion
Impregnation process.Subsequent machining technology is consistent with prior art.
After measured, battery manufactured in the present embodiment is when normal temperature circulation proceeds to 640 weeks, the capacity retention ratio of battery
90.76%, high temperature shelves time extension, and pole piece infiltration is more abundant, and is melted into using small multiplying power electric current, so inside pole piece
Sufficiently, after the high-pressure solid cathode power battery wetting method, battery cycle life gets a promotion for infiltration.
Embodiment 5
A kind of wetting method of high capacity high-pressure solid negative electrode lithium ion battery, the specific steps are as follows:
1) vacuum pumping liquid injection: the cylindrical battery prepared is placed on the fluid injection frame with cup scale metered, is put into 105% institute
Need the amount of electrolyte.Fluid injection is placed in vacuum tank and is vacuumized, vacuum tank vacuum degree control is in -0.09MPa, vacuum pressure maintaining
Between 1min, then pressure release, the pipe tail portion of pressure release connects an exhaust gas processing device, time 5min shelved after pressure release, allows electrolyte
It slowly permeates inside battery core, then recycles four times；
2) high temperature is shelved: by do not sealed after vacuum pumping liquid injection battery core 40 DEG C at a temperature of shelve, liquid injection port is upward,
Shelve time 10h, while nitrogen charging gas shielded in baking oven；
3) pre- chemical conversion: on charging equipment, the battery core after the completion of step 2) is pre-charged with the electric current of 0.2C, is charged
Upper limit voltage is 3.6V, charging time 30min；
4) high temperature is shelved: will not seal after pre- chemical conversion battery core 35 DEG C at a temperature of shelve, liquid injection port is upward, shelves
Time 10h, while nitrogen charging gas shielded in baking oven；
5) secondary fluid injection, sealing: the cylindrical battery for completing step 4) is placed on the fluid injection frame with cup scale metered, is put into
The amount of supplement electrolyte needed for 105%.Fluid injection is placed in vacuum tank and is vacuumized, vacuum tank vacuum degree control-
0.095MPa, vacuum dwell time 3min, then pressure release, the pipe tail portion of pressure release connect an exhaust gas processing device, put after pressure release
Time 10min is set, electrolyte is allowed slowly to permeate inside battery core, is then recycled three times, battery seal after fluid infusion；
6) continue chemical conversion: on charging equipment, the battery core after the completion of step 5) being recharged with the electric current of 0.01C, is filled
Electric upper limit voltage is 3.4V, charging time 300min；High capacity high-pressure solid lithium ion battery is completed after continuous chemical conversion
Impregnation process.Subsequent machining technology is consistent with prior art.
After measured, battery manufactured in the present embodiment is when normal temperature circulation proceeds to 640 weeks, the capacity retention ratio of battery
71.25%, because being melted into using big multiplying power electric current, has an impact to pole piece interface, affect the cycle life of battery.
Embodiment described above is five kinds of schemes citing of the invention, not makees limit in any form to the present invention
System, there are also other variations and modifications on the premise of not exceeding the technical scheme recorded in the claims.
Claims (9)
1. a kind of wetting method of high capacity high-pressure solid negative electrode lithium ion battery, which comprises the following steps:
S1, vacuum pumping liquid injection: the battery prepared is placed on fluid injection frame, and electrolyte needed for 105wt% is put into fluid injection frame
Amount, fluid injection is placed in vacuum tank and is vacuumized, pressure release after vacuum pressure maintaining, and the pipe tail portion of pressure release connects a vent gas treatment dress
It sets, is shelved after pressure release, electrolyte is allowed slowly to permeate inside battery core, then recycle three to six times；
S2, high temperature are shelved: battery core unsealed after vacuum pumping liquid injection shelved at high temperature, liquid injection port is upward, and shelve 8 ~
12h, while being filled with inert gas in baking oven and being protected；
S3, pre- chemical conversion: on charging equipment, being pre-charged the battery core after the completion of step S2 with the electric current of 0.01C ~ 0.2C,
Charging upper limit voltage is 3.2V ~ 3.6V, and the charging time is 30min ~ 300min；
S4, high temperature are shelved: being shelved battery core is not sealed after pre- chemical conversion at high temperature, liquid injection port is upward, shelves 8 ~ 14h, together
When be filled with inert gas in baking oven and protected；
S5, secondary fluid injection, sealing: the battery for completing step S4 is placed on fluid injection frame, electricity needed for 105wt% is put into fluid injection frame
The amount for solving liquid, fluid injection is placed in vacuum tank and is vacuumized, pressure release after vacuum pressure maintaining, the pipe tail portion of pressure release connects at a tail gas
Device is managed, is shelved after pressure release, electrolyte is allowed slowly to permeate inside battery core, two to four completion fluid infusion are then recycled, after fluid infusion
By battery seal；
S6, continuous chemical conversion: on charging equipment, recharging the battery core after the completion of step S5 with the electric current of 0.01C ~ 0.2C,
Charging upper limit voltage is 3.4V ~ 3.65V, and the charging time is 30min ~ 300min；High capacity high pressure is completed after continuous chemical conversion
The impregnation process of real lithium ion battery.
2. a kind of wetting method of high capacity high-pressure solid negative electrode lithium ion battery according to claim 1, it is characterised in that:
The battery is cylindrical battery or rectangular cell.
3. a kind of wetting method of high capacity high-pressure solid negative electrode lithium ion battery according to claim 1, it is characterised in that:
The vacuum degree of vacuum pumping liquid injection process described in step S1 is -0.09 ~ -0.095MPa.
4. a kind of wetting method of high capacity high-pressure solid negative electrode lithium ion battery according to claim 1, it is characterised in that:
The vacuum dwell time described in step S1 is 1 ~ 2min.
5. a kind of wetting method of high capacity high-pressure solid negative electrode lithium ion battery according to claim 1, it is characterised in that:
It is 5 ~ 15min that the time is shelved after pressure release described in step S1.
6. a kind of wetting method of high capacity high-pressure solid negative electrode lithium ion battery according to claim 1, it is characterised in that:
The temperature that high temperature described in step S2 is shelved is 35 ~ 40 DEG C, and the time is 10 ~ 12h.
7. a kind of wetting method of high capacity high-pressure solid negative electrode lithium ion battery according to claim 1, it is characterised in that:
The temperature that high temperature described in step S4 is shelved is 35 ~ 40 DEG C, and the time is 10 ~ 12h.
8. a kind of wetting method of high capacity high-pressure solid negative electrode lithium ion battery according to claim 1, it is characterised in that:
Pre- chemical conversion described in step S3 is the electric current charging 120min with the 0.05C or electric current charging 60min with 0.1C.
9. a kind of wetting method of high capacity high-pressure solid negative electrode lithium ion battery according to claim 1, it is characterised in that:
Continuous chemical conversion described in step S6 is the electric current charging 120min with the 0.05C or electric current charging 60min with 0.1C.
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Cited By (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109687036A (en) * | 2018-12-26 | 2019-04-26 | 深圳市卓能新能源股份有限公司 | Lithium battery manufacturing process |
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| CN112290104A (en) * | 2020-10-20 | 2021-01-29 | 合肥国轩高科动力能源有限公司 | High-temperature negative-pressure formation method of lithium ion battery |
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| CN112366356A (en) * | 2020-07-29 | 2021-02-12 | 万向一二三股份公司 | Method for improving battery cell infiltration effect and lithium ion battery cell |
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| CN109802089B (en) * | 2018-12-24 | 2022-07-26 | 中国电子科技集团公司第十八研究所 | Liquid injection and formation method for ultra-large-capacity single battery |
| CN109687036A (en) * | 2018-12-26 | 2019-04-26 | 深圳市卓能新能源股份有限公司 | Lithium battery manufacturing process |
| EP3761407A4 (en) * | 2019-01-31 | 2021-05-26 | Lg Chem, Ltd. | Method for pre-lithiation of negative electrode for secondary battery |
| US11456446B2 (en) | 2019-01-31 | 2022-09-27 | Lg Energy Solution, Ltd. | Method for pre-lithiation of negative electrode for secondary battery |
| CN109921095A (en) * | 2019-02-11 | 2019-06-21 | 多氟多新能源科技有限公司 | Staged high-temperature vacuum standing method for soft-package battery |
| CN109921095B (en) * | 2019-02-11 | 2022-05-13 | 多氟多新能源科技有限公司 | Staged high-temperature vacuum standing method for soft-package battery |
| CN110137574A (en) * | 2019-04-01 | 2019-08-16 | 江苏百福能源科技有限公司 | A kind of dynamic lithium battery chemical synthesizing method and device |
| CN110137574B (en) * | 2019-04-01 | 2022-04-12 | 江苏百福能源科技有限公司 | Formation method and device of power lithium battery |
| CN111082172A (en) * | 2019-12-06 | 2020-04-28 | 青岛国轩电池有限公司 | Infiltration method of lithium ion battery pole piece |
| CN112490524A (en) * | 2020-03-30 | 2021-03-12 | 万向一二三股份公司 | Formation method of soft package lithium ion battery and soft package lithium ion battery |
| CN111416158A (en) * | 2020-04-26 | 2020-07-14 | 天津市捷威动力工业有限公司 | Pole piece infiltration method of soft package lithium ion battery |
| CN111628228B (en) * | 2020-06-04 | 2023-10-03 | 萨姆蒂萨集成设备设计(邢台)有限公司 | Preparation method of liquid lithium ion pole piece battery pack |
| CN111628228A (en) * | 2020-06-04 | 2020-09-04 | 萨姆蒂萨（天津）数据信息技术有限公司 | Preparation method of liquid lithium ion pole piece battery pack |
| CN111710928B (en) * | 2020-06-10 | 2022-10-11 | 包头昊明稀土新电源科技有限公司 | Formation method of water-based power battery |
| CN111710928A (en) * | 2020-06-10 | 2020-09-25 | 包头昊明稀土新电源科技有限公司 | Formation method of water-based power battery |
| CN112366356A (en) * | 2020-07-29 | 2021-02-12 | 万向一二三股份公司 | Method for improving battery cell infiltration effect and lithium ion battery cell |
| CN112366357A (en) * | 2020-07-31 | 2021-02-12 | 万向一二三股份公司 | Rolling degassing method for soft package lithium battery |
| CN111883851A (en) * | 2020-08-02 | 2020-11-03 | 江西安驰新能源科技有限公司 | Method for formation to matching of lithium ion batteries |
| CN112290104B (en) * | 2020-10-20 | 2021-11-05 | 合肥国轩高科动力能源有限公司 | High-temperature negative-pressure formation method of lithium ion battery |
| CN112290104A (en) * | 2020-10-20 | 2021-01-29 | 合肥国轩高科动力能源有限公司 | High-temperature negative-pressure formation method of lithium ion battery |
| CN112736321B (en) * | 2020-12-30 | 2022-08-05 | 芜湖天弋能源科技有限公司 | Cooling device for lithium ion cell liquid injection and liquid injection method |
| CN112736321A (en) * | 2020-12-30 | 2021-04-30 | 芜湖天弋能源科技有限公司 | Cooling device for lithium ion cell liquid injection and liquid injection method |
| CN113258155A (en) * | 2021-04-25 | 2021-08-13 | 浙江锋锂新能源科技有限公司 | Method for judging infiltration state of lithium ion battery |
| CN113193236B (en) * | 2021-05-06 | 2022-02-11 | 合肥国轩高科动力能源有限公司 | Infiltration formation method of lithium ion battery |
| CN113193236A (en) * | 2021-05-06 | 2021-07-30 | 合肥国轩高科动力能源有限公司 | Infiltration formation method of lithium ion battery |
| CN113451673A (en) * | 2021-06-29 | 2021-09-28 | 惠州市赛能电池有限公司 | Formation method of lithium battery, lithium battery and preparation method thereof |
| CN113921917B (en) * | 2021-09-30 | 2023-02-28 | 蜂巢能源科技有限公司 | Electrolyte infiltration method of lithium ion battery |
| CN113921917A (en) * | 2021-09-30 | 2022-01-11 | 蜂巢能源科技有限公司 | Electrolyte infiltration method of lithium ion battery |
| CN114373997A (en) * | 2022-02-08 | 2022-04-19 | 远景动力技术(江苏)有限公司 | Method for infiltrating pole piece with electrolyte |
| CN114824531A (en) * | 2022-05-30 | 2022-07-29 | 重庆太蓝新能源有限公司 | Electrode infiltration method, lithium ion battery cell and lithium ion battery |
| CN115149075A (en) * | 2022-08-12 | 2022-10-04 | 湖北亿纬动力有限公司 | Method for boxing battery without partition board |
| CN116014259A (en) * | 2023-03-28 | 2023-04-25 | 河南省动力电池创新中心有限公司 | Gel lithium ion battery and preparation method thereof |
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